Oil burner



Aug. 4, 1925. 1,548,719

J. P. LEWIS GIL BURNER Filed Aug. 25, 1924 1 g? a v HI W ATTORNEYS.

WITNESSES I W INVENTQR fi Q? 1 .30 Jfiim RZeu/iw.

Patented thug, t, 1 925 JOHN P. LEWIS, F BROOKLYN, NEW YORK.

OIL BURNER,

Application filed August 25, 1924;, Serial No. 734,068.

To all whom it may concern:

Be it known that 1, JOHN P. LEWIS, a cit1 zen of Newfoundland, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New ork,

'have invented a new and Improved Oil Burner, of which the following is a full, clear, and exact description.

The present invention. relates to'new and useful improvements in burners, and it pertains more articularly to a burner for burnit is a further object of the invention to provide a burner which will give the fuel in its discharge a swirling or rotary motion.

It is a further object of the invention to provide a burner in which the main burner tip also forms a pilot light so long as fuel is fed thereto. I v

It is a still further object of the invention to provide a burner in which the adjustment from minimum to maximum or vice versa, may be expeditiously made With the above and other objects in View, reference is had to the accompanying drawin s, in which- Thgure 1 is a perspective view of a burner constructed in accordance with the present invention;

Fig, 2 is a horizontal sectional view of a burner constructed in accordance with the present invention;

Fig. 3 is a detail sectional view upon an enlarged scale, of the burner nozzle;

Fig 4c is a View in front elevation of the burner nozzle.

Referring more particularly to the draw ings, the reference numeral 5 designates a housing, and such housing has a rearwardlyprojecting extension 6 with a screw-threaded end 7. This housing'5 has a right-angular extension 8 having a passage 9 extending therethrough and in communication with a passage 10 in the housing 5. The housing 5 has a forwardly-projecting extension 11, screw-threaded as at 12, and mounted in said extension 11 there is a tubular member 13,

the forward end of which is screw-threaded as at 14:. Mounted in the housing 5 there is 4 a bushing 15 provided with a screw thread 16. The reference numeral 17 designates a rod which is passed through the passage 10 of the housing 5, the tubular member 13 and the bushing 15, such rod having a. screw thread 18 which engages with the screw thread 16 heretofore mentioned in such a manner that as the rod 17 is rotated it willsimultaneously be moved longitudinally through the passage 10 of the housing 5 and the tubular member 13. The rod 17 is provided with a hand wheel 19 by means of which it is rotated to bring out the above described operation.

Secured to the threaded end 14: of the tubular member 13, by means of a cap or the like, 20, there is a burner nozzle 21 provided with a tapered seat 22 as more clearly shown in Fig. 3. This tapered seat 22 terminates in a discharge opening 24:, through which the fuel to be burned is discharged in the form of-a spray.

Loosely mounted upon the forward end of the rod .17 there is-an atomizer 25. To provide for loosely mounting this atomizer 25, the rod 17 is provided with a socket 26 and the atomizer 25 is provided with a reduced extension 27 adapted to be received within the socket 26. A pin 28 is employed for securing the atomizer to the rod 17. The con- StIllCtlOIljllSt described permits of sufiicient play between the rod 17 and the atomizer 25 to assure the atomizer seating when forced forwardly even though the rod should become slightly out of true longitudinal alinement. The atomizer 25 is formed with a spiral screw or channel 29, and upon its outer, end the atomizer is provided with a, head 30, the head 30 being of conical shape,

- the "angle of a portion-,BO of which is less.

than the angle of the seat 22 of the nozzle, and the extreme end being enlarged as indicated by 30 which construction prevents an absolute seating of the member 30 on the seat 22, and providesa space 30 between the portion 30' and the passage 22. At a point remote from the end of the atomizer 25, the

head is ground to form a valve portion 31,

which is of the same angle as the seat 22, and when the atomizer 25 is moved to the ex;- treme forward position, this valve portion 31 engages the seat 22, as shown at 32 in Fig. 2.

By forming the channel 29 in the atomizer 25, it is seen that a space 33 is provided, and leading from this space and through. the seat 31, there is a plurality of channels 36 spirally arranged.

The extension 8 heretofore mentioned is provided with a seat 40 and adapted to engage said seat 40 is the enlarged end 41 of a uel supply line 42. Surrounding the fuel supply line 42, there is a yoke member 43 which passes beneath the housing 5, as designated by the. reference numeral 44, and an upWardly-extendin arm 45 through which a set screw or the 11 e, 46, passes and engages the housing 5, as shown at 48 in Fig. 2.

By this construction it is apparent that the fuel supply line 42 is maintained in engagement with the extension 8 by theset screw 46 and the yoke 43. a strainer 49 is introduced into the line to insure a cleaning of the fuel oil before it passes into the burner.

The device operates in the following manner:

Fuel oil entering the housing 5 fromthe supply line 42 passes through the strainer 49. From the interior of the housing 5 the fuel oil passes through the tubular member 13 and through the spiral channel 29 where it is given a swirling motion. After it passes from the channel 29 into the space 33, it passes out through the channels 36 and around the head 30 and its enlarged end 30 and is discharged from the nozzle 21. It is understood that a stuiiing box 50 with a gland 51 is employed to prevent the fuel oil from passing out through the rear of the housing around the rod 17;

With the parts in the position shown in Fig. 2, it will be seen that the valve portion 31 is in engagement with the seat 22, but even in this position a small quantity of fuel oil will pass through the channels 36 and be discharged from the nozzle 21. When the parts are thus positioned, the passageway between the extreme end of the head 80 and the wall of the bore through nozzle 21 is of'less area than the aggregate cross-sectional areas of the passageway 36. Hence, there is at this time only a restricted flow to the discharge opening 24.

If the hand wheel 19 be turned to the left, the screw 18 working in the channel 16 in the bushing 15, causes the atomizer .to be moved rearwardly with respect to the nozzle 21 and provides a greater space for the fuel oil to be fed, thus increasing the size of the flame. By this means the flame of the burner is regulated and by varying the pitch of'the screw 18 the burner can be operated from the minimum to themaximum position in one-quarter turn or less of the hand wheel 19.

From the foregoing it is apparent that all of the objects of the present invention At this point have been accomplished, and, further, it should be understood that numerous modifications of structure might readily be resorted to without in the least departing from the scope of the claims.

What is claimed is:

1. In a liquid fuel burner, a burner comprising a nozzle member having a tapered passage therethrough, a head member adapted to be received within the'itapered passage of said nozzle member, said head member'being'tapered through the major portion of its length at an angle different from the angle of the tapered passage to provide'a space between a portion of the head member and the wall of said nozzle member when said head member is seated,

an enlargement at the extreme end of said head to restrict the space, said head member having a spirai channel therein and a tapered portion corresponding to the taper of said tapered passage and adapted to close against the wall thereof, said spiral channel of the head member having a plurality of discharge passages leading there from through that portion of the head member whose taper corresponds to the taper of the passage in the nozzle, and means for moving the head member to cause said tapered portion to move into and out of contact with the wall of said tapered passage. I

2. A liquid fuel burner comprising a housing, a tubular member projecting therefrom, a nozzle member having a tapered passage and secured to the tubular member, a movable head member having a spiral channel and a tapered end, the major portion of which tapered end is of a different angle than the angle of the tapered passage in the nozzle member, whereby a space between the major portion of the tapered end of the head member and the 'walls of the tapered passage is at all times maintained, an angularly disposed portion of the head member forming a valve portion and of the same angle as the tapered passage whereby a relatively tight engage -me11t between the valve portion and the wall of the tapered passage of the nozzle member is had, and discharge passages provided in the head member and serving to establish coimnunication between the spiral channel of the head member and the said space, an enlargement on said major portion to restrict the flow of fuel through the said space when the valve is in seated position, whereby a constant reduced flow of fuel through the nozzle member is bad to provide a pilot light for the burner.

3. An oil burner, comprising a nozzle having a tapered passage extending therethrough, a seat in said passage, a valve member having a channeled portion, said valve member being mounted for movement into and out of contact with said seat, said valve member and the adjacent surface of valve member being reduced in advance of said seat restricting said passage to an area IN said channeled portion to form, a space beless than the aggregate cross sectional areas tween the head member and tapered pasof the channels in said channeled portion sage, and means for eflecting the movement when said valve member is in contact with of said valve member into and out of con said seat to maintain reduced minimum tact with said seat, the space between the flow. surface of said reduced portion of said JGHN P. LES. 

